Gauge



Jan. 6, 1942.

A. EISELE GAUGE Patented Jan. 6, 1942 UNITED STATES PATENT OFFICE GAUGE Andrew Eisele, Detroit, Mich.

Application February 14, 1940. Serial No. 318.731

7 Claims. (Cl. 33-147) This invention relates generally to. gauges and more particularly to gauges for testing or checking the uniformity of bores and other dimensions.

This application is a continuation-impart of my pending application; Serial No. 212,649, filed June 9, 1938, for Gauges.;

It is an object of; the present invention to provide a new and improved internal caliper gauge for testing bores which` are dicult to reach, such as where there is limited space at the bore opening or Where some obstruction such as a web or flange makes it difiqcult to insert the ordinary gauge in the bore.

Another object of the invention vis to provide 1 a new and improved gauge which is adapted for checking the accuracy of a bore and also for checking the distances between bores or apertures or the distance from a surface toan aperture.

Another object of the invention is to provide a new and improved internal caliper gauge having adjustments for overcoming various obstacles encountered in obtaining access to bores.

Other objects of they invention will become apparent from the following detailed description taken in connection with the accompanying drawings in which: n

Figure 1 is a top view shown partly in elevation and partly in section of the gauge and illustrating its use in checking the, accuracy of a bore;

Fig. 2 is a side view of the gauge having parts broken away and in section;

Fig. 3 is a sectional view of part ofthe gauge, r'f:

taken along the line and in the direction of the arrows 3-3 of Fig. 2;

Fig. 4 is a View shown in cross section of the gauge, taken along the line and in the direction of the arrows. 4.-.4 of Fig. 2;

Fig. 5 is a cross sectional view of the gauge, taken along the line and in the direction ofthe arrows 5-5 of 2;

Fig. 6 is a cross sectional view of the gauge, taken along the line 6--6 of Fig. 2;

Fig. 7 is a view in perspective of a part of the gauge shown removed therefrom;

Fig. 8 is a sectional view showing a modification of the structure shown in Fig. 6;

Fig. 9 is a View in side elevation of the gauge i and showing how the gauge is adapted for checking bores in parts where it is diillcult to get into the bore because of limited space before the bore opening;

Fig. 10 is a vertical sectional view of the gauge,

n nu.

taken along the line and in the directionl of the arrows Ill-.I0 of Fig. 9;

Fig. 11 is avertical sectional view of the gauge, taken along the line I,I".-',II of Fig. 10F;

Fig. 12 is a vertical sectional view of a modiiied structure of the gauge of Fig. 1.0;A'and.

Fig. 13 is a. view partly in elevation and partly in section of the gauge, taken along the line and in the direction of the. arrows I3-.I3 of Fig. V10.

Referring to the drawings byl characters of reference, the present internal caliper gauge in-v cludes a substantiallyfhollow support comprising a pair of connected, relatively rotatable tubes lll and Il', the tube I- extending transversely of or substantially at right angles to the tube I l. Acijacent one or its upper end, as seen in Fig. 2, the tube Ill is provided with an external, laterally extending hollow boss I2 in which is received an end. portion of the tube. II, the boss I2 and the tube II being provided respectively with internal and external aligning or opposed annular grooves in which is sprung a U-shaped spring wire retainer I3 which permits adjustment of the posi,- tion of the tube Ill about the axis ofthe tube II but prevents any other relative movement be.- tween the tubes. The tube Ill may be rigidly held to the tube II in any desired adjusted posi.- tion by means of a set'screw I4, see Fig. 1,

Mounted on the free or lower end of the -tube lil `there is an operating member or feeler, designated in general by the numeral I5, for positioning in a bore to be checked, and mounted on the free or outer endof the tube II there is an indicator I6 whichis operatively connected to the operating member or feeler I5 by means hereinafter described in detail. Referring first to the operating member I5, ka body or casing I'I is provided with an external hollow boss I 8 in which is received `a'lower end portion of the tube I0, and the body I'I Vmay be rigidly secured Vto the tube IIJ by a set screw I9 or by other suitable means. The body I1 is further provided with a chamber 2llwhich is closed by a removable closure plate 2| which may be dove-tailed to the body or may be held thereto in any other suitable manner. In the body I'I, a pair of spaced, substantially parallel bores slida'bly receive and guide a pair of guide or locating pins 22 which have outer rounded ends 23 projecting beyond or past a cylindrical outer side wall surface `23a of the body II for engaging the wall surface of a bore to be checked. The inner ends of the pins 22 project into the body chamber and are rigidly secured tcgether'by ar connecting plate ,2.4 by screws 25 so that the pins 22 will move togetherv A pair of helical coil springs 26, in the chamber 20, have ends thereof abutting the connecting plate 24 and their other ends abutting one of the walls of said chamber, the springs 26 urging the pins 22 outwardly. The ends of the springs abutting the connecting plate 24 may fit over the heads of the screws 25 which thus prevent lateral displacement of the springs.

The body I1 is provided with another bore 28 which extends between and is parallel to the pins 22, the bore 28 opening through the cylindrical surface 23a of the body I1. Slidably received and guided in the bore 28 there is a feeler or operating member in the form of a pin 30 having a rounded outer end 3| for engaging the wall surface of a bore to be checked. Interme-' diate its ends, the pin 30 is provided with an annular groove providing opposed shoulders between Which project one end of a stop pin 32 for limiting movement of the pin 38 in opposite directions. An extension member 33, in alignment with and extending in the opposite direction from the pin 3,6, has one end screwthreaded into the casing body ',I1, and 'adjustably screwthreaded into the other ,or outer endof the extension there is a screw 34.havinga rounded outer end for engaging the wall surface of abore to be checked. After adjustment of thev abutment screw 34, a lock nut 35 threadedthereonv may be tightened down against theouter end of the extension to prevent the screw from getting outr of adjustment. Extending at right angles to the extension 33, a pair of additional extensions 36 and 31, see Fig. 13, may be provided for engaging the wallsurface of the bore being checked.

Rotatably mounted in the tube I8 there lis a sectional rod orconnecting member comprising two sections 39 and 40, the section 39 having a tapered endsportion 39a adapted to wedge tightly into a tapered recess 4l!a in one end of the rod 48 to secure the rods tightly together. 'I'he rod section 39 is provided with an annular groove,

means or lever arms. The -rod sections 38 and 4 0 are ntted together such that the flattened end portion ,43 of the rod section 39 is at an angle to the inner fiat surfaced endfof thefeeler member or pin 30 which engages one of the ears 44 and rotates the sectional rod in accordance with any irregularities in a surface engaged by the outer`rounded end 3| ofthe movable pin 30. The other or upper endyof the rod Asection 40 is provided with a attenedportion 45 which engages asimilar flattened portion 46 on a sectional rod which is rotatably mounted in the tube I I. The engaging flattened rodI portions 45 and 46 are relatively angularly Ydisposed and provide for transmission of rotary motion of the rod in Yshaft I to the rod in shaft I I. The rod in shaft Il, like the rod in shaft I0, is made in two sections 48 and 49 which are tightly wedged totions at different or desired angles in accordance,

for example, with theA position of adjustment of the tube I0 with respect to the tube I I. In Fig. 6

ythe flattened end portio`n45'is provided by cut- 'iii (5) V`ing the lever 10'. l

ting away material from the rod, back past the longitudinal center thereof, since the flattened end portion 46 of the rod section 43 is centrally disposed with respect to the longitudinal axis of the rod 48. In the modification of Fig. 8., the flattened end portion is formed by cutting the material, back to the longitudinal axis of the rod section 48', and with this construction the rod section 48 is oiset from the center of its tube Il, as shown, in-order to obtain transmission of rotary motion from the rod 40 to the rod 48.

A handle 58 is provided with a bored recess 5I having a counterbore in which is received an outer end portion of the tube Il, the end of which abuts an internal outwardly facing shoulder 52 formed in the handle by the counterbore. A set screw 53 may be provided for rigidly securing the handle to the tube II. One end of the rod section 49 extends into the handle bore 5I and is provided with a flattened end portion 54 which is theA same as the flattened end portion 43, having laterally extending ears 55. One of the ears 55 abuts the lower end of a plunger orpin 56 which is slidably received and guided in a bore 51 which intersects the handle bore 5I transversely thereof. The plunger 56 has an upwardly directed stem 58 which isA slidably received and guided in a bore through a plug 60 which is screwthreaded into the upper end of the handle bore 51. Surrounding the plunger stern 58, within the bore- 51, there is a helical coil spring 6I which maintains the plunger in contact with one of the ears 55 of the rod section 49.- The Aouter end of the plungerstem 58 abuts the-lower end of an operating plunger 62 of the indicator I6. The in- ,dicator- I6 is mounted on a rod 64, the rod 64 tting into a bore in the handle 5-and being secured to` the handle by a set screw 65. Any suitable type of indicator may be used, the indicator shown having a dial and pointer in a casingv wherein a lightfspring is adapted to return the pointerto a zero mark. f

Mounted on and depending from the tube II, there is a stopvmember 66 for use whereY it is desired to check'the. distance from a surface, as at 61, to the wall of Van aperture, bore or slot or where it is desired to check the distance between two apertures. The stop member 66 is slidably adjustablev along the tube II land may be held in any adjusted positionby a thumb set screw 68.

The modification shown in Figs. 10 and 11 differs from the above described device in that instead of having arotatable rod in the tube I8 there is a lever 10 which is pivoted intermediate its ends to the tube I8 .by a pin 1 I. The lower end of the lever 10 is preferably rounded, as at 12, and abuts the inner fiat surfaced end of the operating member or feeler 30. The upper end of the lever 10 is offset .as at 13,v for engaging an edge of the flattened end portion 46 ofthe rod section 48 and in position to rotate the rod upon movement of the operating'member 30 or to transfer rectilinear movement of the'operating member 30 to rotary movement of the rod in tube Il. In this modification, if vit is desired to rotate the rod 48 in the opposite direction, the pin 1I may be removed and the lever reversed such that the lever oiiset 13 engages the other or upper edge of the. flattened portion 46. In the modification of Fig. 12 the upper end of the lever 10 is provided with a yoke or is bifurcated, as at 15, to provide for rotation of the rod. 48 in either direction without the necessity of revers- In Fig. 2 the gauge is shown in position for checking the distance between an aperture or bore and the surface 61.. The correct distance between the surface 6l and a point on the surface of the bore on a line normal to the surface 61 is, of course, known. Accordingly, the stop member 56 is set or adjusted on the tube Il such that the distance between the point of contact or the lower'rounded end of the stop 66 which engages the surface or face 61 and the outer end of the operating member 3Q is equal to said correct distance or measurement. Consequently, when the gauge is-applied to the bore, if the measurement being checked is less than it should be, the operating members 3E) will be depressed. This will rotate the sectional rod composed of the sections 39 and 40 which will in turn rotate the sectional rods 48 and $9. As the flattened portion 5l!Y of the rod section 69' rotates, it will lift the plunger 5B which will raise the indicator plunger 62 and register the discrepancy on the indicator dial. The dial showing will indicate how much metal should be removed from the face 6l to obtain the desired or correct dimension therefrom to the bore. It is to be understood that the stop member S6 is not employed when checking the accuracy or uniformity of a bore but instead isemployed in checking or measuring the distance between spaced wall surfaces.

In Fig. 9 is illustrated how the present internal caliper gauge, having a right angle support, is adapted for checking bores having limited space in advance of the bore opening, for example, in checking the bores 'I6 in a crank shaft 14. By reason of the right angle support comprising the relatively rotatable tubes l0 and I I, it will be seen that the gauge operating or feeler mechanism l5 may be inserted into a bore of the crankshaft, and it will be appreciated that by adjusting the position of the tube l about the longitudinal 1 axis of the tube ll the gauge may be used at various angles to avoid many obstructions that might be encountered by the checker.

While I have shown and described my invention in detail, it is to be understood that the same is to be limited only by the appended claims for many changes may be made in the structure without departing from the spirit and scope of the invention.

What I claim is:

l. An internal caliper gauge for testing the accuracy of a bore comprising, a substantially right angle hollow support, an indicator mounted on said support adjacent one end thereof, a

rotatable rod in one portion of said right angle support and at one end thereof having a flattened end portion providing cam means for actuating said indicator, a follower member operatively connecting said flattened portion and said indicator, a second rod rotatably mounted in the other portion of said right angle support, said second-named rod having a flattened end portion engageable with a flattened portion on the other end of said rst-named rod for rotating the same, and movable feeler member mounted on said support adjacent the other end thereof and engageable with a flattened portion of the other end of said second-named rod for rotating said second-named rod.

2. A gauge comprising an elongated hollow l support having relatively and substantially right angle end portions, a movable feeler member mounted on one end of said support, an indicator mounted on the other end of said support an-d having operating means, a rotatable rod in one of said end portions and at one end thereof having means, operable by rotation of saidrod to actuate said indicator, a rotatable rod in the other of said end portions andv having means onone end 'thereof cooperable with means on the other end of said first-named rod for rotating the latter uponV rotation of said second-named rod, and means on they other end of said second-named rod cooperable with said. feeler-'member for rotating said second-named rod. f

31.' An internal caliper gaugefor testing the acs curacy of a bore, a substantially right angle hollow` support, an indicator mounted on and adjacent one end of said support, a rotatable rod in one. portion of said support and having each of its ends `provided with a planar surface, a secondrotatable rod in they other portion ofv said support and having each of its ends also provided with a planar surface, follower meansoperatively interconnecting said indicator and one of said surfaces on said first rod and responsiveto rotation .of the latter for actuating said indicator, the other of said surfaces on said first rod and one of said surfaces on said second rod being operatively interconnected so that rotation of said second rod effectuates rotation of said first rod, and a movable feeler mounted on and adjacent the opposite end of said support and operatively connected to the other of said surfaces on said second rod for rotating the latter.

4. An internal caliper gauge for testing the accuracy of a bore, a substantially right angle hollow support, an indicator mounted on and adjacent one end of said support, a rotatable rod in one portion of said support and having each of its ends provided with a planar surface, a second rotatable rod in the other portion of said support and having each of its ends also provided with a planar surface, follower means operatively interconnecting said indicator and one of said surfaces on said rst rod and responsive to rotation of the latter for actuating said indicator, the other of said surfaces on said first rod and one of said surfaces on said second rod occupying planes angularly related one to the other and being operatively interconnected so that rotation of said second rod effectuates rotation of said first rod, and a movable feeler mounted on and adjacent the opposite end of said support and operatively connected to the other of said surfaces on said second rod for rotating the latter.

5. An internal caliper gauge for testing the accuracy of a bore, a substantially right angle hollow support, an indicator mounted on and adjacent one end of said support, a rotatable rod in one portion of saidsupport and having each of its ends provided with a planar surface, a second rotatable rod in the other portion of said support and having each of its ends also pro-r vided with a planar surface, follower means operatively interconnecting said indicator and one of said surfaces on said first rod and responsive to rotation of the latter for actuating said indicator, the other of said surfaces on said first rod and one of said surfaces on said second rod occupying planes angularly relatedl one to the other and being operatively interconnected so that rotation of said second rod efectuates rotation of said first rod, a movable feeler mounted on and adjacent the opposite end of said support and operatively connected to the other o-f said surfaces on said second rod for rotating the latter, and means carried by at least one of said rods for selectively varying said angular relation between said planes.

6. A gauge' comprising an elongated hollow support having relatively and substantially right angle end portions, a movable feeler member mounted on one of said portions, an indicator mounted on the other of said portions and having operating means, rotatable rod means having a pair of interconnected sections in one of said portions and having means at one end of one of said sections operable by rotation of said rod means to actuate said indicator operating means, second rotatable rod means also having a pair of interconnected sections in the other of said portions and having means at one end of one of said second pair of sections cooperable with means on one end of the other of said first pair of sections for rotating said rst rod means upon rotation of said second rod means, and means on one end of the other of said second pair of sections cooperable with said feeler member for rotating said second rod means.

7. A gauge comprising an elongated hollow support having relatively and substantially right angle end portions, a movable feeler member mounted on one of said portions, an indicator mounted on the other of said portions and having operating means, rotatable rod means having a pair of interconnected sections in one of said portions and having means at one end of one of said sections operable by rotation of said rod means to actuate said indicator operating means, second rotatable rod means also having a pair of interconnected sections in the other of said portions and having means at one end of one of said second pair of sections cooperable with means on one end of the other of said iirst pair of sections for rotating said first rod means upon rotation of said second rod means, means on one end of the other of said second pair of sections cooperable with said feeler member for rotating said second rod means, and means carried by at least one of said rod means whereby its sections may be selectively rotated relatively one to the other.

ANDREW EISELE. 

